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- Social control becomes a substitute mechanism as long as excessively high transaction cost fails the market to solve the internality problem. 只有当因交易成本过高使市场解决内部性无效时，社会性管制才作为一种替代性的机制发挥作用。
- After it was mixed with epoxy resin,transition state was formed first.Then they got on with opening ring reactions according to bimolecular nucleophilic substitution mechanism(SN2). 它与环氧树脂混合后首先形成过渡状态，然后按双分子亲核取代(SN2)机理进行开环反应。
- The coach substituted Smith for Jones. 教练让史密斯上场，换下了琼斯。
- Tom substituted for the injured player. 汤姆替换了那个受伤的运动员。
- You operate the mechanism by winding this handle. 操纵这台机器要转动这个把手。
- The understudy was substituted when the leading actor fell ill. 主角演员患病，由替角代替演出。
- The watch has delicate mechanism. 这块表有精细的机械装置。
- Let's examine into the basic mechanism involved. 让我们把有关的基本结构搞搞清楚。
- A striker was substituted for a midfield player in the last half-hour of play. 在比赛的最后30分钟里，一个中场运动员被一个强攻手替换了下去。
- We substituted a red ball for blue to see if the baby would notice. 我们用红皮球换下了蓝皮球，看这婴儿会不会发觉。
- A part of a mechanism that moves in this manner. 横移物以这种方式移动的一个机械零件
- Home-made parts are being substituted for imported ones. 国产零件取代进口零件。
- There's no mechanism for changing the decision. 没有办法改变这一决定。
- An airplane engine is a complex mechanism. 飞机引擎是种复杂的机械装置。
- She substituted margarine for butter. 她用人造的奶油代替黄油。
- A device or mechanism that grinds grain. 磨臼，磨粉机磨谷物的装置或机械
- A tripping or triggering device on a mechanism. 倾卸装置、钩杆机械装置上断开或启动的装置
- He substituted as the typist in the office. 他代替做这个办公室的打字员。
- We had to eat some potatoes substituted as a meal. 我们只得吃了几个马铃薯充饥。
- He substituted for the typist during her absence. 打字员不在时由他代替。
